Obama has come under criticism for a comment, made April 5 at a San Francisco fundraiser, about voter frustration: Obama said that working-class voters stick to divisive issues like religion and gun rights because they are "bitter." Casey says those frustrations are caused by economic downturn and political division, and that Obama can bring change and end political divisiveness--the central theme of Obama's campaign from the start.

Hillary Clinton, in a new ad for North Carolina, hearkens back to her original campaign slogan: "Let the conversation begin." In Clinton's early campaign stops, the New York senator offered "conversation" as an alternative to Bush administration policies, often talking about foreign policy and the war in Iraq, which she dubbed "irresponsible."

Clinton starts her new ad by saying "I told you I wanted to have a conversation," then proceeds to answer a voter's question on the economy. See the two ads below.